Math
Carlos sells video games on a web site. the cost for his web site is $75 per year. Carlos sells each video game for $25. Which equation can Carlos use to determine how many video games "g", he must sell to make a profit of $50 per year? A. 100g = 50 B. 75g + 25 = 50 ...December 16, 2012

Math
Margaret feeds her dog about 300 grams of dog food with each meal. If she feeds her dog twice a day, about how many kilograms of food does she need to feed her dog for a week?December 16, 2012

Math
A map has a scale of 2cm=15km. If the distance between two cities on the map is 9cm, what is the actual distance between the cities?December 16, 2012

chemistry
a balloon is filled with 500 mL of helium at a temperature of 27 degrees celsius and 755 mmHg as the balloon rises in the atmosphere the pressure and temperature drop what volume will it have when it reaches an altitude where the temperature is -33 degrees celcius and the ...May 8, 2012

chemistry
a balloon is filled with 500 mL of helium at a temperature of 27 degrees celsius and 755 mmHg as the balloon rises in the atmosphere the pressure and temperature drop what volume will it have when it reaches an altitude where the temperature is -33 degrees celcius and the ...May 8, 2012

college algebra
Demand Equation: The price p, in dollars, and the quantity x sold of a certain product obey the demand equation x = -5p + 100, 0 (less than or equal to) p (less than or equal to) 20 a.) Express the revenue R as a funtion of x. b.) What is the revenue if 15 units are sold? c.) ...July 20, 2007